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  ArrayList练习-学生管理系统
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<h2 id="学生类"><a href="#学生类" class="headerlink" title="学生类"></a>学生类</h2><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> Student;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Student</span> </span>&#123;</span><br><span class="line">   <span class="keyword">private</span> String name;</span><br><span class="line">   <span class="keyword">private</span> String sex;</span><br><span class="line">   <span class="keyword">private</span> String id;</span><br><span class="line">   <span class="keyword">private</span> String address;</span><br><span class="line">   </span><br><span class="line"><span class="function"><span class="keyword">public</span> <span class="title">Student</span><span class="params">()</span></span>&#123;&#125;</span><br><span class="line">   </span><br><span class="line"><span class="function"><span class="keyword">public</span> <span class="title">Student</span><span class="params">(String name,  String id,String sex, String address)</span> </span>&#123;</span><br><span class="line">	<span class="keyword">super</span>();</span><br><span class="line">	<span class="keyword">this</span>.name = name;</span><br><span class="line">	<span class="keyword">this</span>.sex = sex;</span><br><span class="line">	<span class="keyword">this</span>.id = id;</span><br><span class="line">	<span class="keyword">this</span>.address = address;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> String <span class="title">getName</span><span class="params">()</span> </span>&#123;</span><br><span class="line">	<span class="keyword">return</span> name;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setName</span><span class="params">(String name)</span> </span>&#123;</span><br><span class="line">	<span class="keyword">this</span>.name = name;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> String <span class="title">getSex</span><span class="params">()</span> </span>&#123;</span><br><span class="line">	<span class="keyword">return</span> sex;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setSex</span><span class="params">(String sex)</span> </span>&#123;</span><br><span class="line">	<span class="keyword">this</span>.sex = sex;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> String <span class="title">getId</span><span class="params">()</span> </span>&#123;</span><br><span class="line">	<span class="keyword">return</span> id;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setId</span><span class="params">(String id)</span> </span>&#123;</span><br><span class="line">	<span class="keyword">this</span>.id = id;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> String <span class="title">getAddress</span><span class="params">()</span> </span>&#123;</span><br><span class="line">	<span class="keyword">return</span> address;</span><br><span class="line">&#125;</span><br><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setAddress</span><span class="params">(String address)</span> </span>&#123;</span><br><span class="line">	<span class="keyword">this</span>.address = address;</span><br><span class="line">&#125;</span><br><span class="line"> </span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="测试类"><a href="#测试类" class="headerlink" title="测试类"></a>测试类</h2><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> Student;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.util.ArrayList;</span><br><span class="line"><span class="keyword">import</span> java.util.Scanner;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">StudentMan</span> </span>&#123;</span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> </span>&#123;</span><br><span class="line">		ArrayList&lt;Student&gt; array=<span class="keyword">new</span> ArrayList&lt;Student&gt;();</span><br><span class="line">		<span class="keyword">while</span>(<span class="keyword">true</span>)&#123;</span><br><span class="line">		System.out.println(<span class="string">"----------欢迎进入学生管理系统----------"</span>);</span><br><span class="line">        System.out.println(<span class="string">"          1.添加学生                              "</span>);</span><br><span class="line">        System.out.println(<span class="string">"          2.删除学生          "</span>);</span><br><span class="line">        System.out.println(<span class="string">"          3.修改学生          "</span>);</span><br><span class="line">        System.out.println(<span class="string">"          4.查看所有学生          "</span>);</span><br><span class="line">        System.out.println(<span class="string">"          5.退出                   "</span>);</span><br><span class="line">        System.out.println(<span class="string">"          请输入你的选择：          "</span>);</span><br><span class="line">        Scanner s=<span class="keyword">new</span> Scanner(System.in);</span><br><span class="line">        <span class="keyword">int</span> num=s.nextInt();</span><br><span class="line">        <span class="keyword">switch</span>(num)&#123;</span><br><span class="line">        <span class="keyword">case</span> <span class="number">1</span>:</span><br><span class="line">        	addStudent(array);</span><br><span class="line">        	<span class="keyword">break</span>;</span><br><span class="line">        <span class="keyword">case</span> <span class="number">2</span>:</span><br><span class="line">        	deleteStu(array);</span><br><span class="line">        	<span class="keyword">break</span>;</span><br><span class="line">        <span class="keyword">case</span> <span class="number">3</span>:</span><br><span class="line">        	alert(array);</span><br><span class="line">        	<span class="keyword">break</span>;</span><br><span class="line">        <span class="keyword">case</span> <span class="number">4</span>:</span><br><span class="line">        	selectStu(array);</span><br><span class="line">        	<span class="keyword">break</span>;</span><br><span class="line">        <span class="keyword">case</span> <span class="number">5</span>:</span><br><span class="line">        	System.out.println(<span class="string">"感谢使用"</span>);</span><br><span class="line">        	System.exit(<span class="number">0</span>);<span class="comment">//JVM退出</span></span><br><span class="line">        	</span><br><span class="line">        &#125;</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;</span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">addStudent</span><span class="params">(ArrayList&lt;Student&gt; array)</span></span>&#123;</span><br><span class="line">    	Scanner sc=<span class="keyword">new</span> Scanner(System.in);</span><br><span class="line">    	System.out.println(<span class="string">"请输入姓名"</span>);</span><br><span class="line">    	String name=sc.nextLine();</span><br><span class="line">    	System.out.println(<span class="string">"请输入学号"</span>);</span><br><span class="line">    	String id=sc.nextLine();</span><br><span class="line">    	System.out.println(<span class="string">"请输入性别"</span>);</span><br><span class="line">    	String sex=sc.nextLine();</span><br><span class="line">    	System.out.println(<span class="string">"请输入居住地"</span>);</span><br><span class="line">    	String address=sc.nextLine();</span><br><span class="line">    	</span><br><span class="line">    	<span class="keyword">if</span>(isUsed(array,id))&#123;</span><br><span class="line">    		System.out.println(<span class="string">"该学号已经存在,添加失败"</span>);</span><br><span class="line">    		<span class="keyword">return</span>;</span><br><span class="line">    	&#125;</span><br><span class="line">    	Student stu=<span class="keyword">new</span> Student(name,id,sex,address);</span><br><span class="line">    	</span><br><span class="line">    	System.out.println(array.add(stu)?<span class="string">"添加成功！"</span>:<span class="string">"添加失败"</span>);</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">boolean</span> <span class="title">isUsed</span><span class="params">(ArrayList&lt;Student&gt; array,String id)</span></span>&#123;</span><br><span class="line">    	<span class="keyword">boolean</span> flag=<span class="keyword">false</span>;</span><br><span class="line">    	<span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i&lt;array.size();i++)&#123;</span><br><span class="line">    		Student stu=array.get(i);</span><br><span class="line">    		<span class="keyword">if</span>(stu.getId().equals(id))&#123;</span><br><span class="line">    			flag=<span class="keyword">true</span>;</span><br><span class="line">    			<span class="keyword">break</span>;</span><br><span class="line">    		&#125;</span><br><span class="line">    	&#125;</span><br><span class="line">    	<span class="keyword">return</span> flag;</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">selectStu</span><span class="params">(ArrayList&lt;Student&gt; array)</span></span>&#123;</span><br><span class="line">    	<span class="keyword">if</span>(array.size()==<span class="number">0</span>)&#123;</span><br><span class="line">    		System.out.println(<span class="string">"无信息，请先添加信息"</span>);</span><br><span class="line">    		<span class="keyword">return</span>;</span><br><span class="line">    	&#125;</span><br><span class="line">    	System.out.println(<span class="string">"学号\t姓名\t性别\t居住地"</span>);</span><br><span class="line">    	Student stu=<span class="keyword">new</span> Student();</span><br><span class="line">    	<span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i&lt;array.size();i++)&#123;</span><br><span class="line">    		Student s=array.get(i);</span><br><span class="line">    		System.out.println(s.getId()+<span class="string">"\t"</span>+s.getName()+<span class="string">"\t"</span>+s.getSex()+<span class="string">"\t"</span>+s.getAddress());</span><br><span class="line">    	&#125;</span><br><span class="line">    	</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">deleteStu</span><span class="params">(ArrayList&lt;Student&gt; array)</span></span>&#123;</span><br><span class="line">    	Scanner s=<span class="keyword">new</span> Scanner(System.in);</span><br><span class="line">    	System.out.println(<span class="string">"请输入要删除的学生id"</span>);</span><br><span class="line">    	String id =s.nextLine();</span><br><span class="line">    	<span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i&lt;array.size();i++)&#123;</span><br><span class="line">    		Student stu=array.get(i);</span><br><span class="line">    		<span class="keyword">if</span>(stu.getId().equals(id))&#123;</span><br><span class="line">    			array.remove(i);</span><br><span class="line">    			System.out.println(<span class="string">"删除成功！"</span>);</span><br><span class="line">    		&#125;<span class="keyword">else</span>&#123;</span><br><span class="line">    			System.out.println(<span class="string">"您的输入有误"</span>);</span><br><span class="line">    		&#125;</span><br><span class="line">    	&#125;</span><br><span class="line">    	</span><br><span class="line">    	</span><br><span class="line">    	</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">alert</span><span class="params">(ArrayList&lt;Student&gt; array)</span></span>&#123;</span><br><span class="line">    	Scanner sc=<span class="keyword">new</span> Scanner(System.in);</span><br><span class="line">    	System.out.println(<span class="string">"请输入要修改的学生学号："</span>);</span><br><span class="line">    	String stuid=sc.nextLine();</span><br><span class="line">    	<span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i&lt;array.size();i++)&#123;</span><br><span class="line">    		Student student=array.get(i);</span><br><span class="line">    		<span class="keyword">if</span>(student.getId().equals(stuid))&#123;</span><br><span class="line">    			</span><br><span class="line">    		&#125;<span class="keyword">else</span>&#123;</span><br><span class="line">    			System.out.println(<span class="string">"该学生不存在"</span>);</span><br><span class="line">    			<span class="keyword">return</span>;</span><br><span class="line">    			</span><br><span class="line">                </span><br><span class="line">    		&#125;</span><br><span class="line">    	&#125;</span><br><span class="line">    	System.out.println(<span class="string">"姓名："</span>);</span><br><span class="line">    	String name=sc.nextLine();</span><br><span class="line">    	System.out.println(<span class="string">"学号："</span>);</span><br><span class="line">    	String id=sc.nextLine();</span><br><span class="line">    	System.out.println(<span class="string">"性别："</span>);</span><br><span class="line">    	String sex=sc.nextLine();</span><br><span class="line">    	System.out.println(<span class="string">"居住地："</span>);</span><br><span class="line">    	String address=sc.nextLine();</span><br><span class="line">    	Student stu=<span class="keyword">new</span> Student(name,id,sex,address);</span><br><span class="line">    	</span><br><span class="line">    	<span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i&lt;array.size();i++)&#123;</span><br><span class="line">    		</span><br><span class="line">    			array.set(i, stu);</span><br><span class="line">    			System.out.println(<span class="string">"修改成功！"</span>);  		</span><br><span class="line">    	&#125;</span><br><span class="line">    	</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
      
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